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Survival curves for cats stratified by more or <4 hours of anesthesia time. Cats with <4 hours of anesthesia time had a median survival of 1,329 days, whereas cats with >4 hours of anesthesia time had a median survival time of 10 days (P = 0.049). The vertical tick marks represent the 3 patients that are still alive at the time these data were collected and their days still alive since discharge.
